Fig. 4.

Relative mRNA expression in catfish gonads from 0 to 300 dph. A 3β-hsd (3β-hydroxysteroid dehydrogenase/Δ4–Δ5 isomerase), B cyp17 (17α-hydroxylase/C17–20 lyase type 1), C star (steroidogenic acute regulatory protein), D cyp19a1 (ovarian aromatase), E 17β-hsd1 (17β-hydroxysteroid dehydrogenase type 1) and F cyp11b1 (cytochrome P450 hydroxylase type B or 11β-hydroxylase). ND = Non detectable level. Statistical differences between male and female groups were determined by Student's t test (* p< 0.05; ** p< 0.001).